package com.ruoyi.web.controller.common;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.hutool.core.io.resource.ResourceUtil;
import cn.hutool.json.JSONUtil;
import com.doudou.minio.Minio;
import com.ruoyi.system.domain.PdfFile;
import com.ruoyi.system.service.IPdfFileService;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    @Autowired
    private Minio minio;

    @Autowired
    private IPdfFileService pdfFileService;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getFileName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * PDF文件上传接口
     */
    @PostMapping("/upload/pdf")
    @ApiOperation("PDF文件上传到MinIO")
    public AjaxResult uploadPdfToMinio(@RequestParam("file") MultipartFile file) {
        try {
            // 校验文件是否为PDF
            if (file == null || file.isEmpty()) {
                return AjaxResult.error("请选择要上传的PDF文件");
            }

            String originalFilename = file.getOriginalFilename();
            if (originalFilename == null || !originalFilename.toLowerCase().endsWith(".pdf")) {
                return AjaxResult.error("只允许上传PDF格式的文件");
            }

            // 校验Content-Type
            if (!"application/pdf".equals(file.getContentType())) {
                return AjaxResult.error("文件类型不正确，请上传PDF文件");
            }

            // 上传到MinIO
            String fileUrl = minio.uploadFile( file.getInputStream(),file.getOriginalFilename(),file.getSize());

            PdfFile build = PdfFile.builder()
                    .pdfUrl(fileUrl)
                    .pdfFileName(file.getOriginalFilename())
                    .createTime(new Date())
                    .build();
            int i = pdfFileService.insertPdfFile(build);
            return AjaxResult.success(i);
        } catch (Exception e) {
            log.error("PDF文件上传到MinIO失败", e);
            return AjaxResult.error("PDF文件上传失败: " + e.getMessage());
        }
    }



    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getFileName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * minio统一上传文件接口
     */
    @PostMapping("/minio/upload")
    @ApiOperation("统一上传文件接口")
    public AjaxResult minioUpload(MultipartFile file) throws Exception {
        return AjaxResult.success(minio.uploadFile(file.getInputStream(),file.getOriginalFilename(),file.getSize()));
    }

    /**
     * 读取resources下的json文件
     */
    @GetMapping("/read-json/{fileName}")
    public AjaxResult readJson(@PathVariable("fileName")String fileName){
        return AjaxResult.success(JSONUtil.parse(ResourceUtil.readUtf8Str("json/"+fileName+".json")));
    }
}















